Focusing device



June 17 1924.

C. E. GODLEY FOCUSINGDEVIGE Filed March 51. 1923 ATTORNEY Patented June 17, 1924.

UNITED STATES PATENT OFFICE.

CHARLES E. GODLEY, OLE DETROIT, MICHIGAN, ASSIGNO'R TO EDMUNDS AND JONES CORPORATION, 015 DETROIT, MICHIGAIN, A GORPOR-ATION OF NEW YORK.

FOGU SING DEVICE.

Application fi1ed March 31, 1923. Serial No. 628,999.

To all whom it may concern:

Be it known that I, CHAnLns E. G oDLEY,

a citizen of the United States, and residing at Detroit, in the county of Wayne and 5 State of Michigan, have invented a new and Improved Focusing Device, of which the following is a specification.

This invention relates to means for adjustably supporting the light bulbs of electric lamps relative to the foci of the reflectors of such lamps, and its object is to provide a simple device of this character which can be produced at low cost, which will permit of sufficient adjustment of the light bulb, and which will hold the light bulb in its selected position.

In the accompanying drawing, Fig. 1 is a longitudinal section of a reflector with one type of this focusing device attached thereto. Fig. 2 is an elevation of the central portion of the reflector, the dotted lines indicating the supporting thimble. Fig 3 is a side elevation and Fig. l an end elevation of the supporting thimble shown in Fig. 1. '7

Similar reference characters refer to like parts throughout the several views.

The distance between the pins which project laterally from the bases of light bulbs and the centers of illumination of such bulbs varies greatly in different types of bulbs so that the supporting sleeve for the bulb usually called the connector sleeve, should be slidably mounted in the reflectors of the lamps in which such bulbs are used in order that any available light bulb may be em ployed. These centers of illumination are not always in the axes of the base of the bulbs and a transverse adjustment of the light bulbs should therefore be provided in order that these centers of illumination may be brought to the foci of'the reflectors in which they are mounted.

A reflector 25 is formed with a central opening 26 to receive the connector sleeve 16 which has a spherical band 17 The reflector is formed with notches 27 connecting with the central opening 26 and the depth and width of these notches are about the height and width of the small tongues on the inner ends of the sections 29 which are segments of a cylindrical thimble and have end flanges 30 and longitudinal flanges 31.

A spring 32 is mounted on this thimble between the end flanges 30 and the longitudinal flanges 31.

Slidable within the thimble and held in any desired. position by the sections 29 under pressure of the spring 32, is the band 17 which has a spherical surface so it may be readily turned Within the thimble. The connector sleeve receives the light bulb 13 which may be moved to any desired position within the limits of adjustment by sliding or tilting the connector sleeve within the thimble, the bulb being held in position by the pressure of the sections 29 due to the pressure of the spring 32.

These thimble sections are stamped from sheet metal, the distance between the inner surfaces of the out-turned ends of the tongues 28 to the ends 33 of these sections being about equal to the thickness of the reflector 25 so that when the tongues 28 are placed in the notches 27, the thimble will be properly positioned. When the thimble is assembled and the spring 32 placed thereon, the interior diameter of the thimble is less than the diameter of the spherical band 17 of the connector sleeve and the spring will therefore cause proper pressure and friction to hold the bulb 13 in position.

The number of the fingers Or sections composing these thimbles may be varied as desired by those skilled in the art, as may also the other details of construction, without departing from the spirit of my invention as set forth in the following claims.

I claim 1. In a focusing device for electric lamps, the combination of a reflector having an opening and shallow notches extending therefrom, a connector extending into said opening and embodying a circumferential spherical portion, a thimble attached to said reflector and embodying a series of sections enclosing said sleeve, and a circular coil spring extending around the outside of the sections of the thimble and forcing them against the spherical band of the sleeve, said sections having tongues at their inner ends adapted to pass through the notches in the reflector and to be bent over to secure the thimble to the reflector.

2. In a focusing device, the combination of a reflector having an opening, a connector sleeve extending into said opening, a cylindrical thimble attached to said reflector to receive the connector sleeve and comprising a series of independent sections, each having a longitudinal flange along one edge and a transverse flange at its outer end, and a spring to draw the sections together around the sleeve, said spring being positioned between thelongitudinal and transverse flanges on said sections.

, 3. In a focusing device for electric lamps, the combination of a reflector having a circular opening and radial notches extending therefrom, a connector sleeve extending into said opening, a cylindrical thimble attached to said reflector to receive the connector sleeve and comprising a series of independent sections each embodying a tongue adapted to extend into a radial notch at said opening in the reflector, each of said sections having a longitudinal flange along one edge and a transverse flange at its outer end, and a circular coil spring to draw the sections together around the sleeve.

CHARLES E. GODLEY. 

